am 35036961: Merge "Moved to a more openbsd-like fenv.h"
* commit '35036961f85945483b6b833b976d12e6a58c2313': Moved to a more openbsd-like fenv.h
This commit is contained in:
Calin Juravle
Android Git Automerger
commit
adc3d96fce
@ -1,5 +1,5 @@
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/* $OpenBSD: fenv.c,v 1.3 2012/12/05 23:20:02 deraadt Exp $ */
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/* $NetBSD: fenv.c,v 1.1 2010/07/31 21:47:53 joerg Exp $ */
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/* $OpenBSD: fenv.c,v 1.3 2012/12/05 23:20:02 deraadt Exp $ */
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/* $NetBSD: fenv.c,v 1.1 2010/07/31 21:47:53 joerg Exp $ */
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/*-
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* Copyright (c) 2004-2005 David Schultz <das (at) FreeBSD.ORG>
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@ -43,18 +43,18 @@
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* RESERVED.
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*/
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fenv_t __fe_dfl_env = {
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{
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0xffff0000 | __INITIAL_NPXCW__, /* Control word register */
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0xffff0000, /* Status word register */
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0xffffffff, /* Tag word register */
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{
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0x00000000,
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0x00000000,
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0x00000000,
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0xffff0000
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}
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},
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__INITIAL_MXCSR__ /* MXCSR register */
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{
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0xffff0000 | __INITIAL_NPXCW__, /* Control word register */
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0xffff0000, /* Status word register */
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0xffffffff, /* Tag word register */
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{
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0x00000000,
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0x00000000,
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0x00000000,
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0xffff0000
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}
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},
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__INITIAL_MXCSR__ /* MXCSR register */
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};
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@ -65,26 +65,26 @@ fenv_t __fe_dfl_env = {
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int
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feclearexcept(int excepts)
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{
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fenv_t fenv;
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unsigned int mxcsr;
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fenv_t fenv;
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unsigned int mxcsr;
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excepts &= FE_ALL_EXCEPT;
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excepts &= FE_ALL_EXCEPT;
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (fenv));
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (fenv));
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/* Clear the requested floating-point exceptions */
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fenv.__x87.__status &= ~excepts;
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/* Clear the requested floating-point exceptions */
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fenv.__x87.__status &= ~excepts;
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/* Load the x87 floating-point environent */
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__asm__ __volatile__ ("fldenv %0" : : "m" (fenv));
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/* Load the x87 floating-point environent */
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__asm__ __volatile__ ("fldenv %0" : : "m" (fenv));
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/* Same for SSE environment */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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mxcsr &= ~excepts;
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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/* Same for SSE environment */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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mxcsr &= ~excepts;
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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return (0);
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return (0);
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}
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/*
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@ -95,21 +95,21 @@ feclearexcept(int excepts)
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int
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fegetexceptflag(fexcept_t *flagp, int excepts)
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{
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unsigned short status;
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unsigned int mxcsr;
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unsigned short status;
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unsigned int mxcsr;
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excepts &= FE_ALL_EXCEPT;
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excepts &= FE_ALL_EXCEPT;
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/* Store the current x87 status register */
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__asm__ __volatile__ ("fnstsw %0" : "=am" (status));
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/* Store the current x87 status register */
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__asm__ __volatile__ ("fnstsw %0" : "=am" (status));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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/* Store the results in flagp */
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*flagp = (status | mxcsr) & excepts;
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/* Store the results in flagp */
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*flagp = (status | mxcsr) & excepts;
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return (0);
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return (0);
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}
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/*
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@ -125,12 +125,12 @@ fegetexceptflag(fexcept_t *flagp, int excepts)
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int
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feraiseexcept(int excepts)
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{
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excepts &= FE_ALL_EXCEPT;
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excepts &= FE_ALL_EXCEPT;
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fesetexceptflag((fexcept_t *)&excepts, excepts);
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__asm__ __volatile__ ("fwait");
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fesetexceptflag((fexcept_t *)&excepts, excepts);
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__asm__ __volatile__ ("fwait");
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return (0);
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return (0);
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}
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/*
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@ -141,28 +141,28 @@ feraiseexcept(int excepts)
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int
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fesetexceptflag(const fexcept_t *flagp, int excepts)
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{
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fenv_t fenv;
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unsigned int mxcsr;
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fenv_t fenv;
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unsigned int mxcsr;
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excepts &= FE_ALL_EXCEPT;
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excepts &= FE_ALL_EXCEPT;
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (fenv));
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (fenv));
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/* Set the requested status flags */
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fenv.__x87.__status &= ~excepts;
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fenv.__x87.__status |= *flagp & excepts;
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/* Set the requested status flags */
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fenv.__x87.__status &= ~excepts;
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fenv.__x87.__status |= *flagp & excepts;
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/* Load the x87 floating-point environent */
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__asm__ __volatile__ ("fldenv %0" : : "m" (fenv));
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/* Load the x87 floating-point environent */
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__asm__ __volatile__ ("fldenv %0" : : "m" (fenv));
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/* Same for SSE environment */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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mxcsr &= ~excepts;
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mxcsr |= *flagp & excepts;
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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/* Same for SSE environment */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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mxcsr &= ~excepts;
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mxcsr |= *flagp & excepts;
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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return (0);
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return (0);
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}
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/*
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@ -173,18 +173,18 @@ fesetexceptflag(const fexcept_t *flagp, int excepts)
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int
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fetestexcept(int excepts)
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{
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unsigned short status;
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unsigned int mxcsr;
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unsigned short status;
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unsigned int mxcsr;
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excepts &= FE_ALL_EXCEPT;
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excepts &= FE_ALL_EXCEPT;
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/* Store the current x87 status register */
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__asm__ __volatile__ ("fnstsw %0" : "=am" (status));
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/* Store the current x87 status register */
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__asm__ __volatile__ ("fnstsw %0" : "=am" (status));
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/* Store the MXCSR register state */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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/* Store the MXCSR register state */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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return ((status | mxcsr) & excepts);
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return ((status | mxcsr) & excepts);
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}
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/*
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@ -193,17 +193,17 @@ fetestexcept(int excepts)
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int
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fegetround(void)
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{
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unsigned short control;
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unsigned short control;
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/*
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* We assume that the x87 and the SSE unit agree on the
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* rounding mode. Reading the control word on the x87 turns
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* out to be about 5 times faster than reading it on the SSE
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* unit on an Opteron 244.
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*/
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__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
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/*
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* We assume that the x87 and the SSE unit agree on the
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* rounding mode. Reading the control word on the x87 turns
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* out to be about 5 times faster than reading it on the SSE
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* unit on an Opteron 244.
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*/
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__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
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return (control & _X87_ROUND_MASK);
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return (control & _X87_ROUND_MASK);
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}
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/*
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@ -214,30 +214,30 @@ fegetround(void)
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int
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fesetround(int round)
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{
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unsigned short control;
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unsigned int mxcsr;
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unsigned short control;
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unsigned int mxcsr;
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/* Check whether requested rounding direction is supported */
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if (round & ~_X87_ROUND_MASK)
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return (-1);
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/* Check whether requested rounding direction is supported */
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if (round & ~_X87_ROUND_MASK)
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return (-1);
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/* Store the current x87 control word register */
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__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
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/* Store the current x87 control word register */
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__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
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/* Set the rounding direction */
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control &= ~_X87_ROUND_MASK;
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control |= round;
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/* Set the rounding direction */
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control &= ~_X87_ROUND_MASK;
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control |= round;
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/* Load the x87 control word register */
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__asm__ __volatile__ ("fldcw %0" : : "m" (control));
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/* Load the x87 control word register */
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__asm__ __volatile__ ("fldcw %0" : : "m" (control));
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/* Same for the SSE environment */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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mxcsr &= ~(_X87_ROUND_MASK << _SSE_ROUND_SHIFT);
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mxcsr |= round << _SSE_ROUND_SHIFT;
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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/* Same for the SSE environment */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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mxcsr &= ~(_X87_ROUND_MASK << _SSE_ROUND_SHIFT);
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mxcsr |= round << _SSE_ROUND_SHIFT;
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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return (0);
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return (0);
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}
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/*
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@ -247,23 +247,23 @@ fesetround(int round)
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int
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fegetenv(fenv_t *envp)
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{
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (*envp));
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (*envp));
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/* Store the MXCSR register state */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (envp->__mxcsr));
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/* Store the MXCSR register state */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (envp->__mxcsr));
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/*
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* When an FNSTENV instruction is executed, all pending exceptions are
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* essentially lost (either the x87 FPU status register is cleared or
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* all exceptions are masked).
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*
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* 8.6 X87 FPU EXCEPTION SYNCHRONIZATION -
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* Intel(R) 64 and IA-32 Architectures Softare Developer's Manual - Vol1
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*/
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__asm__ __volatile__ ("fldcw %0" : : "m" (envp->__x87.__control));
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/*
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* When an FNSTENV instruction is executed, all pending exceptions are
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* essentially lost (either the x87 FPU status register is cleared or
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* all exceptions are masked).
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*
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* 8.6 X87 FPU EXCEPTION SYNCHRONIZATION -
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* Intel(R) 64 and IA-32 Architectures Softare Developer's Manual - Vol1
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*/
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__asm__ __volatile__ ("fldcw %0" : : "m" (envp->__x87.__control));
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return (0);
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return (0);
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}
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/*
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@ -275,28 +275,28 @@ fegetenv(fenv_t *envp)
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int
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feholdexcept(fenv_t *envp)
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{
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unsigned int mxcsr;
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unsigned int mxcsr;
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (*envp));
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/* Store the current x87 floating-point environment */
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__asm__ __volatile__ ("fnstenv %0" : "=m" (*envp));
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/* Clear all exception flags in FPU */
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__asm__ __volatile__ ("fnclex");
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/* Clear all exception flags in FPU */
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__asm__ __volatile__ ("fnclex");
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/* Store the MXCSR register state */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (envp->__mxcsr));
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/* Store the MXCSR register state */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (envp->__mxcsr));
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/* Clear exception flags in MXCSR */
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mxcsr = envp->__mxcsr;
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mxcsr &= ~FE_ALL_EXCEPT;
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/* Clear exception flags in MXCSR */
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mxcsr = envp->__mxcsr;
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mxcsr &= ~FE_ALL_EXCEPT;
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/* Mask all exceptions */
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mxcsr |= FE_ALL_EXCEPT << _SSE_MASK_SHIFT;
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/* Mask all exceptions */
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mxcsr |= FE_ALL_EXCEPT << _SSE_MASK_SHIFT;
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/* Store the MXCSR register */
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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return (0);
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return (0);
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}
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/*
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@ -310,13 +310,13 @@ feholdexcept(fenv_t *envp)
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int
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fesetenv(const fenv_t *envp)
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{
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/* Load the x87 floating-point environent */
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__asm__ __volatile__ ("fldenv %0" : : "m" (*envp));
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/* Load the x87 floating-point environent */
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__asm__ __volatile__ ("fldenv %0" : : "m" (*envp));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (envp->__mxcsr));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (envp->__mxcsr));
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return (0);
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return (0);
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}
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/*
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@ -330,22 +330,22 @@ fesetenv(const fenv_t *envp)
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int
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feupdateenv(const fenv_t *envp)
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{
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unsigned short status;
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unsigned int mxcsr;
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unsigned short status;
|
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unsigned int mxcsr;
|
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|
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/* Store the x87 status register */
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__asm__ __volatile__ ("fnstsw %0" : "=am" (status));
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/* Store the x87 status register */
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__asm__ __volatile__ ("fnstsw %0" : "=am" (status));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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/* Store the MXCSR register */
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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/* Install new floating-point environment */
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fesetenv(envp);
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/* Install new floating-point environment */
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fesetenv(envp);
|
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/* Raise any previously accumulated exceptions */
|
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feraiseexcept(status | mxcsr);
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/* Raise any previously accumulated exceptions */
|
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feraiseexcept(status | mxcsr);
|
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|
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return (0);
|
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return (0);
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}
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/*
|
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@ -354,55 +354,55 @@ feupdateenv(const fenv_t *envp)
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int
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feenableexcept(int mask)
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{
|
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unsigned int mxcsr, omask;
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unsigned short control;
|
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unsigned int mxcsr, omask;
|
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unsigned short control;
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mask &= FE_ALL_EXCEPT;
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mask &= FE_ALL_EXCEPT;
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__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
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__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
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omask = ~(control | (mxcsr >> _SSE_MASK_SHIFT)) & FE_ALL_EXCEPT;
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control &= ~mask;
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__asm__ __volatile__ ("fldcw %0" : : "m" (control));
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omask = ~(control | (mxcsr >> _SSE_MASK_SHIFT)) & FE_ALL_EXCEPT;
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control &= ~mask;
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__asm__ __volatile__ ("fldcw %0" : : "m" (control));
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mxcsr &= ~(mask << _SSE_MASK_SHIFT);
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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mxcsr &= ~(mask << _SSE_MASK_SHIFT);
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__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
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return (omask);
|
||||
return (omask);
|
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}
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int
|
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fedisableexcept(int mask)
|
||||
{
|
||||
unsigned int mxcsr, omask;
|
||||
unsigned short control;
|
||||
unsigned int mxcsr, omask;
|
||||
unsigned short control;
|
||||
|
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mask &= FE_ALL_EXCEPT;
|
||||
mask &= FE_ALL_EXCEPT;
|
||||
|
||||
__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
|
||||
__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
|
||||
__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
|
||||
__asm__ __volatile__ ("stmxcsr %0" : "=m" (mxcsr));
|
||||
|
||||
omask = ~(control | (mxcsr >> _SSE_MASK_SHIFT)) & FE_ALL_EXCEPT;
|
||||
control |= mask;
|
||||
__asm__ __volatile__ ("fldcw %0" : : "m" (control));
|
||||
omask = ~(control | (mxcsr >> _SSE_MASK_SHIFT)) & FE_ALL_EXCEPT;
|
||||
control |= mask;
|
||||
__asm__ __volatile__ ("fldcw %0" : : "m" (control));
|
||||
|
||||
mxcsr |= mask << _SSE_MASK_SHIFT;
|
||||
__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
|
||||
mxcsr |= mask << _SSE_MASK_SHIFT;
|
||||
__asm__ __volatile__ ("ldmxcsr %0" : : "m" (mxcsr));
|
||||
|
||||
return (omask);
|
||||
return (omask);
|
||||
}
|
||||
|
||||
int
|
||||
fegetexcept(void)
|
||||
{
|
||||
unsigned short control;
|
||||
unsigned short control;
|
||||
|
||||
/*
|
||||
* We assume that the masks for the x87 and the SSE unit are
|
||||
* the same.
|
||||
*/
|
||||
__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
|
||||
/*
|
||||
* We assume that the masks for the x87 and the SSE unit are
|
||||
* the same.
|
||||
*/
|
||||
__asm__ __volatile__ ("fnstcw %0" : "=m" (control));
|
||||
|
||||
return (~control & FE_ALL_EXCEPT);
|
||||
return (~control & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
103
libm/arm/fenv.c
103
libm/arm/fenv.c
@ -33,3 +33,106 @@
|
||||
* this as a default environment.
|
||||
*/
|
||||
const fenv_t __fe_dfl_env = 0;
|
||||
|
||||
int fegetenv(fenv_t* __envp) {
|
||||
fenv_t _fpscr;
|
||||
__asm__ __volatile__("vmrs %0,fpscr" : "=r" (_fpscr));
|
||||
*__envp = _fpscr;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fesetenv(const fenv_t* __envp) {
|
||||
fenv_t _fpscr = *__envp;
|
||||
__asm__ __volatile__("vmsr fpscr,%0" : :"ri" (_fpscr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feclearexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
*__flagp = __fpscr & __excepts;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
__fpscr |= *__flagp & __excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feraiseexcept(int __excepts) {
|
||||
fexcept_t __ex = __excepts;
|
||||
fesetexceptflag(&__ex, __excepts);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fetestexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return (__fpscr & __excepts);
|
||||
}
|
||||
|
||||
int fegetround(void) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
return ((_fpscr >> _FPSCR_RMODE_SHIFT) & 0x3);
|
||||
}
|
||||
|
||||
int fesetround(int __round) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
_fpscr &= ~(0x3 << _FPSCR_RMODE_SHIFT);
|
||||
_fpscr |= (__round << _FPSCR_RMODE_SHIFT);
|
||||
fesetenv(&_fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feholdexcept(fenv_t* __envp) {
|
||||
fenv_t __env;
|
||||
fegetenv(&__env);
|
||||
*__envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT | _FPSCR_ENABLE_MASK);
|
||||
fesetenv(&__env);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feupdateenv(const fenv_t* __envp) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
fesetenv(__envp);
|
||||
feraiseexcept(__fpscr & FE_ALL_EXCEPT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feenableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr | (__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT;
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fedisableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr & ~((__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT);
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fegetexcept(void) {
|
||||
fenv_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return ((__fpscr & _FPSCR_ENABLE_MASK) >> _FPSCR_ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
@ -33,3 +33,109 @@
|
||||
* this as a default environment.
|
||||
*/
|
||||
const fenv_t __fe_dfl_env = 0;
|
||||
|
||||
int fegetenv(fenv_t* __envp) {
|
||||
fenv_t _fpcr, _fpsr;
|
||||
__asm__ __volatile__("mrs %0,fpcr" : "=r" (_fpcr));
|
||||
__asm__ __volatile__("mrs %0,fpsr" : "=r" (_fpsr));
|
||||
*__envp = (_fpcr | _fpsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fesetenv(const fenv_t* __envp) {
|
||||
fenv_t _fpcr = (*__envp & FPCR_MASK);
|
||||
fenv_t _fpsr = (*__envp & FPSR_MASK);
|
||||
__asm__ __volatile__("msr fpcr,%0" : :"ri" (_fpcr));
|
||||
__asm__ __volatile__("msr fpsr,%0" : :"ri" (_fpsr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feclearexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
*__flagp = __fpscr & __excepts;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
__fpscr |= *__flagp & __excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feraiseexcept(int __excepts) {
|
||||
fexcept_t __ex = __excepts;
|
||||
fesetexceptflag(&__ex, __excepts);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fetestexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return (__fpscr & __excepts);
|
||||
}
|
||||
|
||||
int fegetround(void) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
return ((_fpscr >> _FPSCR_RMODE_SHIFT) & 0x3);
|
||||
}
|
||||
|
||||
int fesetround(int __round) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
_fpscr &= ~(0x3 << _FPSCR_RMODE_SHIFT);
|
||||
_fpscr |= (__round << _FPSCR_RMODE_SHIFT);
|
||||
fesetenv(&_fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feholdexcept(fenv_t* __envp) {
|
||||
fenv_t __env;
|
||||
fegetenv(&__env);
|
||||
*__envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT | _FPSCR_ENABLE_MASK);
|
||||
fesetenv(&__env);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feupdateenv(const fenv_t* __envp) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
fesetenv(__envp);
|
||||
feraiseexcept(__fpscr & FE_ALL_EXCEPT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feenableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr | (__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT;
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fedisableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr & ~((__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT);
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fegetexcept(void) {
|
||||
fenv_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return ((__fpscr & _FPSCR_ENABLE_MASK) >> _FPSCR_ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
454
libm/i387/fenv.c
454
libm/i387/fenv.c
@ -36,24 +36,24 @@
|
||||
* has the rounding control bits offset by 3 and the exception mask
|
||||
* bits offset by 7.
|
||||
*/
|
||||
#define _SSE_ROUND_SHIFT 3
|
||||
#define _SSE_EMASK_SHIFT 7
|
||||
#define _SSE_ROUND_SHIFT 3
|
||||
#define _SSE_EMASK_SHIFT 7
|
||||
|
||||
const fenv_t __fe_dfl_env = {
|
||||
__INITIAL_NPXCW__, /*__control*/
|
||||
0x0000, /*__mxcsr_hi*/
|
||||
0x0000, /*__status*/
|
||||
0x1f80, /*__mxcsr_lo*/
|
||||
0xffffffff, /*__tag*/
|
||||
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff } /*__other*/
|
||||
__INITIAL_NPXCW__, /*__control*/
|
||||
0x0000, /*__mxcsr_hi*/
|
||||
0x0000, /*__status*/
|
||||
0x1f80, /*__mxcsr_lo*/
|
||||
0xffffffff, /*__tag*/
|
||||
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff } /*__other*/
|
||||
};
|
||||
|
||||
#define __fldcw(__cw) __asm __volatile("fldcw %0" : : "m" (__cw))
|
||||
#define __fldenv(__env) __asm __volatile("fldenv %0" : : "m" (__env))
|
||||
#define __fldenvx(__env) __asm __volatile("fldenv %0" : : "m" (__env) \
|
||||
: "st", "st(1)", "st(2)", "st(3)", "st(4)", \
|
||||
"st(5)", "st(6)", "st(7)")
|
||||
#define __fldenvx(__env) __asm __volatile("fldenv %0" : : "m" (__env) \
|
||||
: "st", "st(1)", "st(2)", "st(3)", "st(4)", \
|
||||
"st(5)", "st(6)", "st(7)")
|
||||
#define __fnclex() __asm __volatile("fnclex")
|
||||
#define __fnstenv(__env) __asm __volatile("fnstenv %0" : "=m" (*(__env)))
|
||||
#define __fnstcw(__cw) __asm __volatile("fnstcw %0" : "=m" (*(__cw)))
|
||||
@ -68,22 +68,22 @@ enum __sse_support { __SSE_YES, __SSE_NO, __SSE_UNK };
|
||||
#define __HAS_SSE() 1
|
||||
#else
|
||||
#define __HAS_SSE() (__has_sse == __SSE_YES || \
|
||||
(__has_sse == __SSE_UNK && __test_sse()))
|
||||
(__has_sse == __SSE_UNK && __test_sse()))
|
||||
#endif
|
||||
|
||||
enum __sse_support __has_sse =
|
||||
#ifdef __SSE__
|
||||
__SSE_YES;
|
||||
__SSE_YES;
|
||||
#else
|
||||
__SSE_UNK;
|
||||
__SSE_UNK;
|
||||
#endif
|
||||
|
||||
#ifndef __SSE__
|
||||
#define getfl(x) __asm __volatile("pushfl\n\tpopl %0" : "=mr" (*(x)))
|
||||
#define setfl(x) __asm __volatile("pushl %0\n\tpopfl" : : "g" (x))
|
||||
#define cpuid_dx(x) __asm __volatile("pushl %%ebx\n\tmovl $1, %%eax\n\t" \
|
||||
"cpuid\n\tpopl %%ebx" \
|
||||
: "=d" (*(x)) : : "eax", "ecx")
|
||||
#define getfl(x) __asm __volatile("pushfl\n\tpopl %0" : "=mr" (*(x)))
|
||||
#define setfl(x) __asm __volatile("pushl %0\n\tpopfl" : : "g" (x))
|
||||
#define cpuid_dx(x) __asm __volatile("pushl %%ebx\n\tmovl $1, %%eax\n\t" \
|
||||
"cpuid\n\tpopl %%ebx" \
|
||||
: "=d" (*(x)) : : "eax", "ecx")
|
||||
|
||||
/*
|
||||
* Test for SSE support on this processor. We need to do this because
|
||||
@ -94,298 +94,298 @@ enum __sse_support __has_sse =
|
||||
int
|
||||
__test_sse(void)
|
||||
{
|
||||
int flag, nflag;
|
||||
int dx_features;
|
||||
int flag, nflag;
|
||||
int dx_features;
|
||||
|
||||
/* Am I a 486? */
|
||||
getfl(&flag);
|
||||
nflag = flag ^ 0x200000;
|
||||
setfl(nflag);
|
||||
getfl(&nflag);
|
||||
if (flag != nflag) {
|
||||
/* Not a 486, so CPUID should work. */
|
||||
cpuid_dx(&dx_features);
|
||||
if (dx_features & 0x2000000) {
|
||||
__has_sse = __SSE_YES;
|
||||
return (1);
|
||||
}
|
||||
}
|
||||
__has_sse = __SSE_NO;
|
||||
return (0);
|
||||
/* Am I a 486? */
|
||||
getfl(&flag);
|
||||
nflag = flag ^ 0x200000;
|
||||
setfl(nflag);
|
||||
getfl(&nflag);
|
||||
if (flag != nflag) {
|
||||
/* Not a 486, so CPUID should work. */
|
||||
cpuid_dx(&dx_features);
|
||||
if (dx_features & 0x2000000) {
|
||||
__has_sse = __SSE_YES;
|
||||
return (1);
|
||||
}
|
||||
}
|
||||
__has_sse = __SSE_NO;
|
||||
return (0);
|
||||
}
|
||||
#endif /* __SSE__ */
|
||||
|
||||
int
|
||||
fesetexceptflag(const fexcept_t *flagp, int excepts)
|
||||
{
|
||||
fenv_t env;
|
||||
__uint32_t mxcsr;
|
||||
fenv_t env;
|
||||
__uint32_t mxcsr;
|
||||
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
if (excepts) { /* Do nothing if excepts is 0 */
|
||||
__fnstenv(&env);
|
||||
env.__status &= ~excepts;
|
||||
env.__status |= *flagp & excepts;
|
||||
__fnclex();
|
||||
__fldenv(env);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
mxcsr &= ~excepts;
|
||||
mxcsr |= *flagp & excepts;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
if (excepts) { /* Do nothing if excepts is 0 */
|
||||
__fnstenv(&env);
|
||||
env.__status &= ~excepts;
|
||||
env.__status |= *flagp & excepts;
|
||||
__fnclex();
|
||||
__fldenv(env);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
mxcsr &= ~excepts;
|
||||
mxcsr |= *flagp & excepts;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
|
||||
return (0);
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
feraiseexcept(int excepts)
|
||||
{
|
||||
fexcept_t ex = excepts;
|
||||
fexcept_t ex = excepts;
|
||||
|
||||
fesetexceptflag(&ex, excepts);
|
||||
__fwait();
|
||||
return (0);
|
||||
fesetexceptflag(&ex, excepts);
|
||||
__fwait();
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
fegetenv(fenv_t *envp)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint32_t mxcsr;
|
||||
|
||||
__fnstenv(envp);
|
||||
/*
|
||||
* fnstenv masks all exceptions, so we need to restore
|
||||
* the old control word to avoid this side effect.
|
||||
*/
|
||||
__fldcw(envp->__control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
envp->__mxcsr_hi = mxcsr >> 16;
|
||||
envp->__mxcsr_lo = mxcsr & 0xffff;
|
||||
}
|
||||
return (0);
|
||||
__fnstenv(envp);
|
||||
/*
|
||||
* fnstenv masks all exceptions, so we need to restore
|
||||
* the old control word to avoid this side effect.
|
||||
*/
|
||||
__fldcw(envp->__control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
envp->__mxcsr_hi = mxcsr >> 16;
|
||||
envp->__mxcsr_lo = mxcsr & 0xffff;
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
feholdexcept(fenv_t *envp)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
fenv_t env;
|
||||
__uint32_t mxcsr;
|
||||
fenv_t env;
|
||||
|
||||
__fnstenv(&env);
|
||||
*envp = env;
|
||||
env.__status &= ~FE_ALL_EXCEPT;
|
||||
env.__control |= FE_ALL_EXCEPT;
|
||||
__fnclex();
|
||||
__fldenv(env);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
envp->__mxcsr_hi = mxcsr >> 16;
|
||||
envp->__mxcsr_lo = mxcsr & 0xffff;
|
||||
mxcsr &= ~FE_ALL_EXCEPT;
|
||||
mxcsr |= FE_ALL_EXCEPT << _SSE_EMASK_SHIFT;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
return (0);
|
||||
__fnstenv(&env);
|
||||
*envp = env;
|
||||
env.__status &= ~FE_ALL_EXCEPT;
|
||||
env.__control |= FE_ALL_EXCEPT;
|
||||
__fnclex();
|
||||
__fldenv(env);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
envp->__mxcsr_hi = mxcsr >> 16;
|
||||
envp->__mxcsr_lo = mxcsr & 0xffff;
|
||||
mxcsr &= ~FE_ALL_EXCEPT;
|
||||
mxcsr |= FE_ALL_EXCEPT << _SSE_EMASK_SHIFT;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
feupdateenv(const fenv_t *envp)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t status;
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t status;
|
||||
|
||||
__fnstsw(&status);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
fesetenv(envp);
|
||||
feraiseexcept((mxcsr | status) & FE_ALL_EXCEPT);
|
||||
return (0);
|
||||
__fnstsw(&status);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
fesetenv(envp);
|
||||
feraiseexcept((mxcsr | status) & FE_ALL_EXCEPT);
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
feenableexcept(int mask)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t control, omask;
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t control, omask;
|
||||
|
||||
mask &= FE_ALL_EXCEPT;
|
||||
__fnstcw(&control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
omask = ~(control | mxcsr >> _SSE_EMASK_SHIFT) & FE_ALL_EXCEPT;
|
||||
if (mask) {
|
||||
control &= ~mask;
|
||||
__fldcw(control);
|
||||
if (__HAS_SSE()) {
|
||||
mxcsr &= ~(mask << _SSE_EMASK_SHIFT);
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
return (omask);
|
||||
mask &= FE_ALL_EXCEPT;
|
||||
__fnstcw(&control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
omask = ~(control | mxcsr >> _SSE_EMASK_SHIFT) & FE_ALL_EXCEPT;
|
||||
if (mask) {
|
||||
control &= ~mask;
|
||||
__fldcw(control);
|
||||
if (__HAS_SSE()) {
|
||||
mxcsr &= ~(mask << _SSE_EMASK_SHIFT);
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
return (omask);
|
||||
}
|
||||
|
||||
int
|
||||
fedisableexcept(int mask)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t control, omask;
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t control, omask;
|
||||
|
||||
mask &= FE_ALL_EXCEPT;
|
||||
__fnstcw(&control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
omask = ~(control | mxcsr >> _SSE_EMASK_SHIFT) & FE_ALL_EXCEPT;
|
||||
if (mask) {
|
||||
control |= mask;
|
||||
__fldcw(control);
|
||||
if (__HAS_SSE()) {
|
||||
mxcsr |= mask << _SSE_EMASK_SHIFT;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
return (omask);
|
||||
mask &= FE_ALL_EXCEPT;
|
||||
__fnstcw(&control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
omask = ~(control | mxcsr >> _SSE_EMASK_SHIFT) & FE_ALL_EXCEPT;
|
||||
if (mask) {
|
||||
control |= mask;
|
||||
__fldcw(control);
|
||||
if (__HAS_SSE()) {
|
||||
mxcsr |= mask << _SSE_EMASK_SHIFT;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
return (omask);
|
||||
}
|
||||
|
||||
int
|
||||
feclearexcept(int excepts)
|
||||
{
|
||||
fenv_t env;
|
||||
__uint32_t mxcsr;
|
||||
fenv_t env;
|
||||
__uint32_t mxcsr;
|
||||
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
if (excepts) { /* Do nothing if excepts is 0 */
|
||||
__fnstenv(&env);
|
||||
env.__status &= ~excepts;
|
||||
__fnclex();
|
||||
__fldenv(env);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
mxcsr &= ~excepts;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
return (0);
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
if (excepts) { /* Do nothing if excepts is 0 */
|
||||
__fnstenv(&env);
|
||||
env.__status &= ~excepts;
|
||||
__fnclex();
|
||||
__fldenv(env);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
mxcsr &= ~excepts;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
fegetexceptflag(fexcept_t *flagp, int excepts)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t status;
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t status;
|
||||
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
__fnstsw(&status);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
*flagp = (status | mxcsr) & excepts;
|
||||
return (0);
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
__fnstsw(&status);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
*flagp = (status | mxcsr) & excepts;
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
fetestexcept(int excepts)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t status;
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t status;
|
||||
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
if (excepts) { /* Do nothing if excepts is 0 */
|
||||
__fnstsw(&status);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
return ((status | mxcsr) & excepts);
|
||||
}
|
||||
return (0);
|
||||
excepts &= FE_ALL_EXCEPT;
|
||||
if (excepts) { /* Do nothing if excepts is 0 */
|
||||
__fnstsw(&status);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
} else {
|
||||
mxcsr = 0;
|
||||
}
|
||||
return ((status | mxcsr) & excepts);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
fegetround(void)
|
||||
{
|
||||
__uint16_t control;
|
||||
__uint16_t control;
|
||||
|
||||
/*
|
||||
* We assume that the x87 and the SSE unit agree on the
|
||||
* rounding mode. Reading the control word on the x87 turns
|
||||
* out to be about 5 times faster than reading it on the SSE
|
||||
* unit on an Opteron 244.
|
||||
*/
|
||||
__fnstcw(&control);
|
||||
return (control & _ROUND_MASK);
|
||||
/*
|
||||
* We assume that the x87 and the SSE unit agree on the
|
||||
* rounding mode. Reading the control word on the x87 turns
|
||||
* out to be about 5 times faster than reading it on the SSE
|
||||
* unit on an Opteron 244.
|
||||
*/
|
||||
__fnstcw(&control);
|
||||
return (control & _ROUND_MASK);
|
||||
}
|
||||
|
||||
int
|
||||
fesetround(int round)
|
||||
{
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t control;
|
||||
__uint32_t mxcsr;
|
||||
__uint16_t control;
|
||||
|
||||
if (round & ~_ROUND_MASK) {
|
||||
return (-1);
|
||||
} else {
|
||||
__fnstcw(&control);
|
||||
control &= ~_ROUND_MASK;
|
||||
control |= round;
|
||||
__fldcw(control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
mxcsr &= ~(_ROUND_MASK << _SSE_ROUND_SHIFT);
|
||||
mxcsr |= round << _SSE_ROUND_SHIFT;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
if (round & ~_ROUND_MASK) {
|
||||
return (-1);
|
||||
} else {
|
||||
__fnstcw(&control);
|
||||
control &= ~_ROUND_MASK;
|
||||
control |= round;
|
||||
__fldcw(control);
|
||||
if (__HAS_SSE()) {
|
||||
__stmxcsr(&mxcsr);
|
||||
mxcsr &= ~(_ROUND_MASK << _SSE_ROUND_SHIFT);
|
||||
mxcsr |= round << _SSE_ROUND_SHIFT;
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
fesetenv(const fenv_t *envp)
|
||||
{
|
||||
fenv_t env = *envp;
|
||||
__uint32_t mxcsr;
|
||||
fenv_t env = *envp;
|
||||
__uint32_t mxcsr;
|
||||
|
||||
mxcsr = (env.__mxcsr_hi << 16) | (env.__mxcsr_lo);
|
||||
env.__mxcsr_hi = 0xffff;
|
||||
env.__mxcsr_lo = 0xffff;
|
||||
/*
|
||||
* XXX Using fldenvx() instead of fldenv() tells the compiler that this
|
||||
* instruction clobbers the i387 register stack. This happens because
|
||||
* we restore the tag word from the saved environment. Normally, this
|
||||
* would happen anyway and we wouldn't care, because the ABI allows
|
||||
* function calls to clobber the i387 regs. However, fesetenv() is
|
||||
* inlined, so we need to be more careful.
|
||||
*/
|
||||
__fldenvx(env);
|
||||
if (__HAS_SSE()) {
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
return (0);
|
||||
mxcsr = (env.__mxcsr_hi << 16) | (env.__mxcsr_lo);
|
||||
env.__mxcsr_hi = 0xffff;
|
||||
env.__mxcsr_lo = 0xffff;
|
||||
/*
|
||||
* XXX Using fldenvx() instead of fldenv() tells the compiler that this
|
||||
* instruction clobbers the i387 register stack. This happens because
|
||||
* we restore the tag word from the saved environment. Normally, this
|
||||
* would happen anyway and we wouldn't care, because the ABI allows
|
||||
* function calls to clobber the i387 regs. However, fesetenv() is
|
||||
* inlined, so we need to be more careful.
|
||||
*/
|
||||
__fldenvx(env);
|
||||
if (__HAS_SSE()) {
|
||||
__ldmxcsr(mxcsr);
|
||||
}
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
fegetexcept(void)
|
||||
{
|
||||
__uint16_t control;
|
||||
__uint16_t control;
|
||||
|
||||
/*
|
||||
* We assume that the masks for the x87 and the SSE unit are
|
||||
* the same.
|
||||
*/
|
||||
__fnstcw(&control);
|
||||
return (~control & FE_ALL_EXCEPT);
|
||||
/*
|
||||
* We assume that the masks for the x87 and the SSE unit are
|
||||
* the same.
|
||||
*/
|
||||
__fnstcw(&control);
|
||||
return (~control & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
@ -24,17 +24,11 @@
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef _AMD64_FENV_H_
|
||||
#define _AMD64_FENV_H_
|
||||
#ifndef _AMD64_FENV_H_
|
||||
#define _AMD64_FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
/*
|
||||
* This file combines the OpenBSD include/fenv.h and machine/fenv.h to fit
|
||||
* the style of the other architectures (where we couldn't just take an
|
||||
* upstream fenv.h and had to write our own).
|
||||
*/
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
/*
|
||||
@ -44,20 +38,20 @@ __BEGIN_DECLS
|
||||
*
|
||||
* We use such values that allow direct bitwise operations on FPU/SSE registers.
|
||||
*/
|
||||
#define FE_INVALID 0x01
|
||||
#define FE_DENORMAL 0x02
|
||||
#define FE_DIVBYZERO 0x04
|
||||
#define FE_OVERFLOW 0x08
|
||||
#define FE_UNDERFLOW 0x10
|
||||
#define FE_INEXACT 0x20
|
||||
#define FE_INVALID 0x01
|
||||
#define FE_DENORMAL 0x02
|
||||
#define FE_DIVBYZERO 0x04
|
||||
#define FE_OVERFLOW 0x08
|
||||
#define FE_UNDERFLOW 0x10
|
||||
#define FE_INEXACT 0x20
|
||||
|
||||
/*
|
||||
* The following symbol is simply the bitwise-inclusive OR of all floating-point
|
||||
* exception constants defined above.
|
||||
*/
|
||||
#define FE_ALL_EXCEPT (FE_INVALID | FE_DENORMAL | FE_DIVBYZERO | \
|
||||
FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
|
||||
#define _SSE_MASK_SHIFT 7
|
||||
#define FE_ALL_EXCEPT (FE_INVALID | FE_DENORMAL | FE_DIVBYZERO | \
|
||||
FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
|
||||
#define _SSE_MASK_SHIFT 7
|
||||
|
||||
/*
|
||||
* Each symbol representing the rounding direction, expands to an integer
|
||||
@ -65,44 +59,32 @@ __BEGIN_DECLS
|
||||
*
|
||||
* We use such values that allow direct bitwise operations on FPU/SSE registers.
|
||||
*/
|
||||
#define FE_TONEAREST 0x000
|
||||
#define FE_DOWNWARD 0x400
|
||||
#define FE_UPWARD 0x800
|
||||
#define FE_TOWARDZERO 0xc00
|
||||
#define FE_TONEAREST 0x000
|
||||
#define FE_DOWNWARD 0x400
|
||||
#define FE_UPWARD 0x800
|
||||
#define FE_TOWARDZERO 0xc00
|
||||
|
||||
/*
|
||||
* The following symbol is simply the bitwise-inclusive OR of all floating-point
|
||||
* rounding direction constants defined above.
|
||||
*/
|
||||
#define _X87_ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | \
|
||||
FE_TOWARDZERO)
|
||||
#define _SSE_ROUND_SHIFT 3
|
||||
#define _X87_ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | \
|
||||
FE_TOWARDZERO)
|
||||
#define _SSE_ROUND_SHIFT 3
|
||||
|
||||
/*
|
||||
* fenv_t represents the entire floating-point environment.
|
||||
*/
|
||||
typedef struct {
|
||||
struct {
|
||||
unsigned int __control; /* Control word register */
|
||||
unsigned int __status; /* Status word register */
|
||||
unsigned int __tag; /* Tag word register */
|
||||
unsigned int __others[4]; /* EIP, Pointer Selector, etc */
|
||||
} __x87;
|
||||
unsigned int __mxcsr; /* Control, status register */
|
||||
typedef struct {
|
||||
struct {
|
||||
__uint32_t __control; /* Control word register */
|
||||
__uint32_t __status; /* Status word register */
|
||||
__uint32_t __tag; /* Tag word register */
|
||||
__uint32_t __others[4]; /* EIP, Pointer Selector, etc */
|
||||
} __x87;
|
||||
__uint32_t __mxcsr; /* Control, status register */
|
||||
} fenv_t;
|
||||
|
||||
/*
|
||||
* The following constant represents the default floating-point environment
|
||||
* (that is, the one installed at program startup) and has type pointer to
|
||||
* const-qualified fenv_t.
|
||||
*
|
||||
* It can be used as an argument to the functions within the <fenv.h> header
|
||||
* that manage the floating-point environment, namely fesetenv() and
|
||||
* feupdateenv().
|
||||
*/
|
||||
extern fenv_t __fe_dfl_env;
|
||||
#define FE_DFL_ENV ((const fenv_t *)&__fe_dfl_env)
|
||||
|
||||
/*
|
||||
* fexcept_t represents the floating-point status flags collectively, including
|
||||
* any status the implementation associates with the flags.
|
||||
@ -115,33 +97,8 @@ extern fenv_t __fe_dfl_env;
|
||||
* A floating-point control mode is a system variable whose value may be set by
|
||||
* the user to affect the subsequent behavior of floating-point arithmetic.
|
||||
*/
|
||||
typedef unsigned int fexcept_t;
|
||||
|
||||
/* C99 floating-point exception functions */
|
||||
int feclearexcept(int excepts);
|
||||
int fegetexceptflag(fexcept_t *flagp, int excepts);
|
||||
int fesetexceptflag(const fexcept_t *flagp, int excepts);
|
||||
/* feraiseexcept does not set the inexact flag on overflow/underflow */
|
||||
int feraiseexcept(int excepts);
|
||||
int fetestexcept(int excepts);
|
||||
|
||||
/* C99 rounding control functions */
|
||||
int fegetround(void);
|
||||
int fesetround(int round);
|
||||
|
||||
/* C99 floating-point environment functions */
|
||||
int fegetenv(fenv_t *__envp);
|
||||
int feholdexcept(fenv_t *__envp);
|
||||
int fesetenv(const fenv_t *envp);
|
||||
int feupdateenv(const fenv_t *__envp);
|
||||
|
||||
#if __BSD_VISIBLE
|
||||
/* Additional support functions to set/query floating point traps */
|
||||
int feenableexcept(int __mask);
|
||||
int fedisableexcept(int __mask);
|
||||
int fegetexcept(void);
|
||||
#endif /* __BSD_VISIBLE */
|
||||
typedef __uint_32 fexcept_t;
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_AMD64_FENV_H_ */
|
||||
#endif /* !_AMD64_FENV_H_ */
|
||||
@ -1,176 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
* Rewritten for Android.
|
||||
*
|
||||
* The ARM FPSCR is described here:
|
||||
* http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0344b/Chdfafia.html
|
||||
*/
|
||||
|
||||
#ifndef _FENV_H_
|
||||
#define _FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
typedef __uint32_t fenv_t;
|
||||
typedef __uint32_t fexcept_t;
|
||||
|
||||
/* Exception flags. */
|
||||
#define FE_INVALID 0x01
|
||||
#define FE_DIVBYZERO 0x02
|
||||
#define FE_OVERFLOW 0x04
|
||||
#define FE_UNDERFLOW 0x08
|
||||
#define FE_INEXACT 0x10
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
||||
#define _FPSCR_ENABLE_SHIFT 8
|
||||
#define _FPSCR_ENABLE_MASK (FE_ALL_EXCEPT << _FPSCR_ENABLE_SHIFT)
|
||||
|
||||
/* Rounding modes. */
|
||||
#define FE_TONEAREST 0x0
|
||||
#define FE_UPWARD 0x1
|
||||
#define FE_DOWNWARD 0x2
|
||||
#define FE_TOWARDZERO 0x3
|
||||
#define _FPSCR_RMODE_SHIFT 22
|
||||
|
||||
/* Default floating-point environment. */
|
||||
extern const fenv_t __fe_dfl_env;
|
||||
#define FE_DFL_ENV (&__fe_dfl_env)
|
||||
|
||||
static __inline int fegetenv(fenv_t* __envp) {
|
||||
fenv_t _fpscr;
|
||||
__asm__ __volatile__("vmrs %0,fpscr" : "=r" (_fpscr));
|
||||
*__envp = _fpscr;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fesetenv(const fenv_t* __envp) {
|
||||
fenv_t _fpscr = *__envp;
|
||||
__asm__ __volatile__("vmsr fpscr,%0" : :"ri" (_fpscr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feclearexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
*__flagp = __fpscr & __excepts;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
__fpscr |= *__flagp & __excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feraiseexcept(int __excepts) {
|
||||
fexcept_t __ex = __excepts;
|
||||
fesetexceptflag(&__ex, __excepts);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fetestexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return (__fpscr & __excepts);
|
||||
}
|
||||
|
||||
static __inline int fegetround(void) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
return ((_fpscr >> _FPSCR_RMODE_SHIFT) & 0x3);
|
||||
}
|
||||
|
||||
static __inline int fesetround(int __round) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
_fpscr &= ~(0x3 << _FPSCR_RMODE_SHIFT);
|
||||
_fpscr |= (__round << _FPSCR_RMODE_SHIFT);
|
||||
fesetenv(&_fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feholdexcept(fenv_t* __envp) {
|
||||
fenv_t __env;
|
||||
fegetenv(&__env);
|
||||
*__envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT | _FPSCR_ENABLE_MASK);
|
||||
fesetenv(&__env);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feupdateenv(const fenv_t* __envp) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
fesetenv(__envp);
|
||||
feraiseexcept(__fpscr & FE_ALL_EXCEPT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if __BSD_VISIBLE
|
||||
|
||||
static __inline int feenableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr | (__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT;
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fedisableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr & ~((__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT);
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fegetexcept(void) {
|
||||
fenv_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return ((__fpscr & _FPSCR_ENABLE_MASK) >> _FPSCR_ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
#endif /* __BSD_VISIBLE */
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_FENV_H_ */
|
||||
68
libm/include/arm/machine/fenv.h
Normal file
68
libm/include/arm/machine/fenv.h
Normal file
@ -0,0 +1,68 @@
|
||||
/*-
|
||||
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
* Rewritten for Android.
|
||||
*
|
||||
* The ARM FPSCR is described here:
|
||||
* http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0344b/Chdfafia.html
|
||||
*/
|
||||
|
||||
#ifndef _ARM_FENV_H_
|
||||
#define _ARM_FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
typedef __uint32_t fenv_t;
|
||||
typedef __uint32_t fexcept_t;
|
||||
|
||||
/* Exception flags. */
|
||||
#define FE_INVALID 0x01
|
||||
#define FE_DIVBYZERO 0x02
|
||||
#define FE_OVERFLOW 0x04
|
||||
#define FE_UNDERFLOW 0x08
|
||||
#define FE_INEXACT 0x10
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \
|
||||
FE_OVERFLOW | FE_UNDERFLOW)
|
||||
|
||||
#define _FPSCR_ENABLE_SHIFT 8
|
||||
#define _FPSCR_ENABLE_MASK (FE_ALL_EXCEPT << _FPSCR_ENABLE_SHIFT)
|
||||
|
||||
/* Rounding modes. */
|
||||
#define FE_TONEAREST 0x0
|
||||
#define FE_UPWARD 0x1
|
||||
#define FE_DOWNWARD 0x2
|
||||
#define FE_TOWARDZERO 0x3
|
||||
|
||||
#define _FPSCR_RMODE_SHIFT 22
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_ARM_FENV_H_ */
|
||||
@ -38,8 +38,8 @@
|
||||
* section 5.1.2 SIMD and Floating-Point Registers
|
||||
*/
|
||||
|
||||
#ifndef _FENV_H_
|
||||
#define _FENV_H_
|
||||
#ifndef _ARM64_FENV_H_
|
||||
#define _ARM64_FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
@ -54,15 +54,18 @@ typedef __uint32_t fexcept_t;
|
||||
#define FE_OVERFLOW 0x04
|
||||
#define FE_UNDERFLOW 0x08
|
||||
#define FE_INEXACT 0x10
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \
|
||||
FE_OVERFLOW | FE_UNDERFLOW)
|
||||
|
||||
#define _FPSCR_ENABLE_SHIFT 8
|
||||
#define _FPSCR_ENABLE_MASK (FE_ALL_EXCEPT << _FPSCR_ENABLE_SHIFT)
|
||||
#define _FPSCR_ENABLE_MASK (FE_ALL_EXCEPT << _FPSCR_ENABLE_SHIFT)
|
||||
|
||||
/* Rounding modes. */
|
||||
#define FE_TONEAREST 0x0
|
||||
#define FE_UPWARD 0x1
|
||||
#define FE_DOWNWARD 0x2
|
||||
#define FE_TOWARDZERO 0x3
|
||||
|
||||
#define _FPSCR_RMODE_SHIFT 22
|
||||
|
||||
#define FPCR_IOE (1 << 8)
|
||||
@ -113,120 +116,6 @@ typedef __uint32_t fexcept_t;
|
||||
FPSR_Z | \
|
||||
FPSR_N )
|
||||
|
||||
/* Default floating-point environment. */
|
||||
extern const fenv_t __fe_dfl_env;
|
||||
#define FE_DFL_ENV (&__fe_dfl_env)
|
||||
|
||||
static __inline int fegetenv(fenv_t* __envp) {
|
||||
fenv_t _fpcr, _fpsr;
|
||||
__asm__ __volatile__("mrs %0,fpcr" : "=r" (_fpcr));
|
||||
__asm__ __volatile__("mrs %0,fpsr" : "=r" (_fpsr));
|
||||
*__envp = (_fpcr | _fpsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fesetenv(const fenv_t* __envp) {
|
||||
fenv_t _fpcr = (*__envp & FPCR_MASK);
|
||||
fenv_t _fpsr = (*__envp & FPSR_MASK);
|
||||
__asm__ __volatile__("msr fpcr,%0" : :"ri" (_fpcr));
|
||||
__asm__ __volatile__("msr fpsr,%0" : :"ri" (_fpsr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feclearexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
*__flagp = __fpscr & __excepts;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
__fpscr &= ~__excepts;
|
||||
__fpscr |= *__flagp & __excepts;
|
||||
fesetenv(&__fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feraiseexcept(int __excepts) {
|
||||
fexcept_t __ex = __excepts;
|
||||
fesetexceptflag(&__ex, __excepts);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fetestexcept(int __excepts) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return (__fpscr & __excepts);
|
||||
}
|
||||
|
||||
static __inline int fegetround(void) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
return ((_fpscr >> _FPSCR_RMODE_SHIFT) & 0x3);
|
||||
}
|
||||
|
||||
static __inline int fesetround(int __round) {
|
||||
fenv_t _fpscr;
|
||||
fegetenv(&_fpscr);
|
||||
_fpscr &= ~(0x3 << _FPSCR_RMODE_SHIFT);
|
||||
_fpscr |= (__round << _FPSCR_RMODE_SHIFT);
|
||||
fesetenv(&_fpscr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feholdexcept(fenv_t* __envp) {
|
||||
fenv_t __env;
|
||||
fegetenv(&__env);
|
||||
*__envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT | _FPSCR_ENABLE_MASK);
|
||||
fesetenv(&__env);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feupdateenv(const fenv_t* __envp) {
|
||||
fexcept_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
fesetenv(__envp);
|
||||
feraiseexcept(__fpscr & FE_ALL_EXCEPT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if __BSD_VISIBLE
|
||||
|
||||
static __inline int feenableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr | (__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT;
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fedisableexcept(int __mask) {
|
||||
fenv_t __old_fpscr, __new_fpscr;
|
||||
fegetenv(&__old_fpscr);
|
||||
__new_fpscr = __old_fpscr & ~((__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT);
|
||||
fesetenv(&__new_fpscr);
|
||||
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fegetexcept(void) {
|
||||
fenv_t __fpscr;
|
||||
fegetenv(&__fpscr);
|
||||
return ((__fpscr & _FPSCR_ENABLE_MASK) >> _FPSCR_ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
#endif /* __BSD_VISIBLE */
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_FENV_H_ */
|
||||
#endif /* !_ARM64_FENV_H_ */
|
||||
69
libm/include/fenv.h
Normal file
69
libm/include/fenv.h
Normal file
@ -0,0 +1,69 @@
|
||||
/* $OpenBSD: fenv.h,v 1.2 2011/05/25 21:46:49 martynas Exp $ */
|
||||
/* $NetBSD: fenv.h,v 1.2.4.1 2011/02/08 16:18:55 bouyer Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2010 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef _FENV_H_
|
||||
#define _FENV_H_
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#include <machine/fenv.h>
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
int feclearexcept(int);
|
||||
int fegetexceptflag(fexcept_t *, int);
|
||||
int feraiseexcept(int);
|
||||
int fesetexceptflag(const fexcept_t *, int);
|
||||
int fetestexcept(int);
|
||||
|
||||
int fegetround(void);
|
||||
int fesetround(int);
|
||||
|
||||
int fegetenv(fenv_t *);
|
||||
int feholdexcept(fenv_t *);
|
||||
int fesetenv(const fenv_t *);
|
||||
int feupdateenv(const fenv_t *);
|
||||
|
||||
int feenableexcept(int);
|
||||
int fedisableexcept(int);
|
||||
int fegetexcept(void);
|
||||
|
||||
/*
|
||||
* The following constant represents the default floating-point environment
|
||||
* (that is, the one installed at program startup) and has type pointer to
|
||||
* const-qualified fenv_t.
|
||||
*
|
||||
* It can be used as an argument to the functions that manage the floating-point
|
||||
* environment, namely fesetenv() and feupdateenv().
|
||||
*/
|
||||
extern const fenv_t __fe_dfl_env;
|
||||
#define FE_DFL_ENV (&__fe_dfl_env)
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* ! _FENV_H_ */
|
||||
@ -26,8 +26,8 @@
|
||||
* $FreeBSD: src/lib/msun/i387/fenv.h,v 1.4 2005/03/17 22:21:46 das Exp $
|
||||
*/
|
||||
|
||||
#ifndef _FENV_H_
|
||||
#define _FENV_H_
|
||||
#ifndef _I387_FENV_H_
|
||||
#define _I387_FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
@ -38,64 +38,34 @@ __BEGIN_DECLS
|
||||
* mxcsr into some reserved fields, rather than changing sizeof(fenv_t).
|
||||
*/
|
||||
typedef struct {
|
||||
__uint16_t __control;
|
||||
__uint16_t __mxcsr_hi;
|
||||
__uint16_t __status;
|
||||
__uint16_t __mxcsr_lo;
|
||||
__uint32_t __tag;
|
||||
char __other[16];
|
||||
__uint16_t __control;
|
||||
__uint16_t __mxcsr_hi;
|
||||
__uint16_t __status;
|
||||
__uint16_t __mxcsr_lo;
|
||||
__uint32_t __tag;
|
||||
char __other[16];
|
||||
} fenv_t;
|
||||
|
||||
typedef __uint16_t fexcept_t;
|
||||
typedef __uint16_t fexcept_t;
|
||||
|
||||
/* Exception flags */
|
||||
#define FE_INVALID 0x01
|
||||
#define FE_DENORMAL 0x02
|
||||
#define FE_DIVBYZERO 0x04
|
||||
#define FE_OVERFLOW 0x08
|
||||
#define FE_UNDERFLOW 0x10
|
||||
#define FE_INEXACT 0x20
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
|
||||
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
||||
#define FE_INVALID 0x01
|
||||
#define FE_DENORMAL 0x02
|
||||
#define FE_DIVBYZERO 0x04
|
||||
#define FE_OVERFLOW 0x08
|
||||
#define FE_UNDERFLOW 0x10
|
||||
#define FE_INEXACT 0x20
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
|
||||
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
||||
|
||||
/* Rounding modes */
|
||||
#define FE_TONEAREST 0x0000
|
||||
#define FE_DOWNWARD 0x0400
|
||||
#define FE_UPWARD 0x0800
|
||||
#define FE_TOWARDZERO 0x0c00
|
||||
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
|
||||
FE_UPWARD | FE_TOWARDZERO)
|
||||
|
||||
/* Default floating-point environment */
|
||||
extern const fenv_t __fe_dfl_env;
|
||||
#define FE_DFL_ENV (&__fe_dfl_env)
|
||||
|
||||
/* C99 floating-point exception functions */
|
||||
int feclearexcept(int excepts);
|
||||
int fegetexceptflag(fexcept_t *flagp, int excepts);
|
||||
int fesetexceptflag(const fexcept_t *flagp, int excepts);
|
||||
/* feraiseexcept does not set the inexact flag on overflow/underflow */
|
||||
int feraiseexcept(int excepts);
|
||||
int fetestexcept(int excepts);
|
||||
|
||||
/* C99 rounding control functions */
|
||||
int fegetround(void);
|
||||
int fesetround(int round);
|
||||
|
||||
/* C99 floating-point environment functions */
|
||||
int fegetenv(fenv_t *__envp);
|
||||
int feholdexcept(fenv_t *__envp);
|
||||
int fesetenv(const fenv_t *envp);
|
||||
int feupdateenv(const fenv_t *__envp);
|
||||
|
||||
#if __BSD_VISIBLE
|
||||
/* Additional support functions to set/query floating point traps */
|
||||
int feenableexcept(int __mask);
|
||||
int fedisableexcept(int __mask);
|
||||
int fegetexcept(void);
|
||||
|
||||
#endif /* __BSD_VISIBLE */
|
||||
#define FE_TONEAREST 0x0000
|
||||
#define FE_DOWNWARD 0x0400
|
||||
#define FE_UPWARD 0x0800
|
||||
#define FE_TOWARDZERO 0x0c00
|
||||
#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
|
||||
FE_UPWARD | FE_TOWARDZERO)
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_FENV_H_ */
|
||||
#endif /* !I387_FENV_H_ */
|
||||
@ -1,225 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
Rewritten for Android.
|
||||
*/
|
||||
|
||||
/* MIPS FPU floating point control register bits.
|
||||
*
|
||||
* 31-25 -> floating point conditions code bits set by FP compare
|
||||
* instructions
|
||||
* 24 -> flush denormalized results to zero instead of
|
||||
* causing unimplemented operation exception.
|
||||
* 23 -> Condition bit
|
||||
* 22 -> In conjunction with FS detects denormalized
|
||||
* operands and replaces them internally with 0.
|
||||
* 21 -> In conjunction with FS forces denormalized operands
|
||||
* to the closest normalized value.
|
||||
* 20-18 -> reserved (read as 0, write with 0)
|
||||
* 17 -> cause bit for unimplemented operation
|
||||
* 16 -> cause bit for invalid exception
|
||||
* 15 -> cause bit for division by zero exception
|
||||
* 14 -> cause bit for overflow exception
|
||||
* 13 -> cause bit for underflow exception
|
||||
* 12 -> cause bit for inexact exception
|
||||
* 11 -> enable exception for invalid exception
|
||||
* 10 -> enable exception for division by zero exception
|
||||
* 9 -> enable exception for overflow exception
|
||||
* 8 -> enable exception for underflow exception
|
||||
* 7 -> enable exception for inexact exception
|
||||
* 6 -> flag invalid exception
|
||||
* 5 -> flag division by zero exception
|
||||
* 4 -> flag overflow exception
|
||||
* 3 -> flag underflow exception
|
||||
* 2 -> flag inexact exception
|
||||
* 1-0 -> rounding control
|
||||
*
|
||||
*
|
||||
* Rounding Control:
|
||||
* 00 - rounding to nearest (RN)
|
||||
* 01 - rounding toward zero (RZ)
|
||||
* 10 - rounding (up) toward plus infinity (RP)
|
||||
* 11 - rounding (down)toward minus infinity (RM)
|
||||
*/
|
||||
|
||||
#ifndef _FENV_H_
|
||||
#define _FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
typedef __uint32_t fenv_t;
|
||||
typedef __uint32_t fexcept_t;
|
||||
|
||||
/* Exception flags */
|
||||
#define FE_INVALID 0x40
|
||||
#define FE_DIVBYZERO 0x20
|
||||
#define FE_OVERFLOW 0x10
|
||||
#define FE_UNDERFLOW 0x08
|
||||
#define FE_INEXACT 0x04
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
|
||||
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
||||
#define _FCSR_CAUSE_SHIFT 10
|
||||
#define _ENABLE_SHIFT 5
|
||||
#define _FCSR_ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
|
||||
|
||||
/* Rounding modes */
|
||||
#define FE_TONEAREST 0x0000
|
||||
#define FE_TOWARDZERO 0x0001
|
||||
#define FE_UPWARD 0x0002
|
||||
#define FE_DOWNWARD 0x0003
|
||||
#define _FCSR_RMODE_SHIFT 0
|
||||
#define _FCSR_RMASK 0x3
|
||||
/* Default floating-point environment */
|
||||
extern const fenv_t __fe_dfl_env;
|
||||
#define FE_DFL_ENV (&__fe_dfl_env)
|
||||
|
||||
static __inline int fegetenv(fenv_t* __envp) {
|
||||
fenv_t _fcsr = 0;
|
||||
#ifdef __mips_hard_float
|
||||
__asm__ __volatile__("cfc1 %0,$31" : "=r" (_fcsr));
|
||||
#endif
|
||||
*__envp = _fcsr;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fesetenv(const fenv_t* __envp) {
|
||||
fenv_t _fcsr = *__envp;
|
||||
#ifdef __mips_hard_float
|
||||
__asm__ __volatile__("ctc1 %0,$31" : : "r" (_fcsr));
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feclearexcept(int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
__excepts &= FE_ALL_EXCEPT;
|
||||
__fcsr &= ~(__excepts | (__excepts << _FCSR_CAUSE_SHIFT));
|
||||
fesetenv(&__fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
*__flagp = __fcsr & __excepts & FE_ALL_EXCEPT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
/* Ensure that flags are all legal */
|
||||
__excepts &= FE_ALL_EXCEPT;
|
||||
__fcsr &= ~__excepts;
|
||||
__fcsr |= *__flagp & __excepts;
|
||||
fesetenv(&__fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feraiseexcept(int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
/* Ensure that flags are all legal */
|
||||
__excepts &= FE_ALL_EXCEPT;
|
||||
/* Cause bit needs to be set as well for generating the exception*/
|
||||
__fcsr |= __excepts | (__excepts << _FCSR_CAUSE_SHIFT);
|
||||
fesetenv(&__fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int fetestexcept(int __excepts) {
|
||||
fexcept_t __FCSR;
|
||||
fegetenv(&__FCSR);
|
||||
return (__FCSR & __excepts & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fegetround(void) {
|
||||
fenv_t _fcsr;
|
||||
fegetenv(&_fcsr);
|
||||
return (_fcsr & _FCSR_RMASK);
|
||||
}
|
||||
|
||||
static __inline int fesetround(int __round) {
|
||||
fenv_t _fcsr;
|
||||
fegetenv(&_fcsr);
|
||||
_fcsr &= ~_FCSR_RMASK;
|
||||
_fcsr |= (__round & _FCSR_RMASK ) ;
|
||||
fesetenv(&_fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feholdexcept(fenv_t* __envp) {
|
||||
fenv_t __env;
|
||||
fegetenv(&__env);
|
||||
*__envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT | _FCSR_ENABLE_MASK);
|
||||
fesetenv(&__env);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static __inline int feupdateenv(const fenv_t* __envp) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
fesetenv(__envp);
|
||||
feraiseexcept(__fcsr & FE_ALL_EXCEPT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if __BSD_VISIBLE
|
||||
|
||||
static __inline int feenableexcept(int __mask) {
|
||||
fenv_t __old_fcsr, __new_fcsr;
|
||||
fegetenv(&__old_fcsr);
|
||||
__new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT;
|
||||
fesetenv(&__new_fcsr);
|
||||
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fedisableexcept(int __mask) {
|
||||
fenv_t __old_fcsr, __new_fcsr;
|
||||
fegetenv(&__old_fcsr);
|
||||
__new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT);
|
||||
fesetenv(&__new_fcsr);
|
||||
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
static __inline int fegetexcept(void) {
|
||||
fenv_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
return ((__fcsr & _FCSR_ENABLE_MASK) >> _ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
#endif /* __BSD_VISIBLE */
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_FENV_H_ */
|
||||
105
libm/include/mips/machine/fenv.h
Normal file
105
libm/include/mips/machine/fenv.h
Normal file
@ -0,0 +1,105 @@
|
||||
/*-
|
||||
* Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $
|
||||
*/
|
||||
|
||||
/*
|
||||
Rewritten for Android.
|
||||
*/
|
||||
|
||||
/* MIPS FPU floating point control register bits.
|
||||
*
|
||||
* 31-25 -> floating point conditions code bits set by FP compare
|
||||
* instructions
|
||||
* 24 -> flush denormalized results to zero instead of
|
||||
* causing unimplemented operation exception.
|
||||
* 23 -> Condition bit
|
||||
* 22 -> In conjunction with FS detects denormalized
|
||||
* operands and replaces them internally with 0.
|
||||
* 21 -> In conjunction with FS forces denormalized operands
|
||||
* to the closest normalized value.
|
||||
* 20-18 -> reserved (read as 0, write with 0)
|
||||
* 17 -> cause bit for unimplemented operation
|
||||
* 16 -> cause bit for invalid exception
|
||||
* 15 -> cause bit for division by zero exception
|
||||
* 14 -> cause bit for overflow exception
|
||||
* 13 -> cause bit for underflow exception
|
||||
* 12 -> cause bit for inexact exception
|
||||
* 11 -> enable exception for invalid exception
|
||||
* 10 -> enable exception for division by zero exception
|
||||
* 9 -> enable exception for overflow exception
|
||||
* 8 -> enable exception for underflow exception
|
||||
* 7 -> enable exception for inexact exception
|
||||
* 6 -> flag invalid exception
|
||||
* 5 -> flag division by zero exception
|
||||
* 4 -> flag overflow exception
|
||||
* 3 -> flag underflow exception
|
||||
* 2 -> flag inexact exception
|
||||
* 1-0 -> rounding control
|
||||
*
|
||||
*
|
||||
* Rounding Control:
|
||||
* 00 - rounding to nearest (RN)
|
||||
* 01 - rounding toward zero (RZ)
|
||||
* 10 - rounding (up) toward plus infinity (RP)
|
||||
* 11 - rounding (down)toward minus infinity (RM)
|
||||
*/
|
||||
|
||||
#ifndef _MIPS_FENV_H_
|
||||
#define _MIPS_FENV_H_
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
__BEGIN_DECLS
|
||||
|
||||
typedef __uint32_t fenv_t;
|
||||
typedef __uint32_t lfexcept_t;
|
||||
|
||||
/* Exception flags */
|
||||
#define FE_INVALID 0x40
|
||||
#define FE_DIVBYZERO 0x20
|
||||
#define FE_OVERFLOW 0x10
|
||||
#define FE_UNDERFLOW 0x08
|
||||
#define FE_INEXACT 0x04
|
||||
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
|
||||
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
|
||||
|
||||
#define _FCSR_CAUSE_SHIFT 10
|
||||
#define _ENABLE_SHIFT 5
|
||||
#define _FCSR_ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
|
||||
|
||||
/* Rounding modes */
|
||||
#define FE_TONEAREST 0x0000
|
||||
#define FE_TOWARDZERO 0x0001
|
||||
#define FE_UPWARD 0x0002
|
||||
#define FE_DOWNWARD 0x0003
|
||||
|
||||
#define _FCSR_RMODE_SHIFT 0
|
||||
#define _FCSR_RMASK 0x3
|
||||
|
||||
__END_DECLS
|
||||
|
||||
#endif /* !_MIPS_FENV_H_ */
|
||||
115
libm/mips/fenv.c
115
libm/mips/fenv.c
@ -33,3 +33,118 @@
|
||||
* this as a default environment.
|
||||
*/
|
||||
const fenv_t __fe_dfl_env = 0;
|
||||
|
||||
int fegetenv(fenv_t* __envp) {
|
||||
fenv_t _fcsr = 0;
|
||||
#ifdef __mips_hard_float
|
||||
__asm__ __volatile__("cfc1 %0,$31" : "=r" (_fcsr));
|
||||
#endif
|
||||
*__envp = _fcsr;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fesetenv(const fenv_t* __envp) {
|
||||
fenv_t _fcsr = *__envp;
|
||||
#ifdef __mips_hard_float
|
||||
__asm__ __volatile__("ctc1 %0,$31" : : "r" (_fcsr));
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feclearexcept(int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
__excepts &= FE_ALL_EXCEPT;
|
||||
__fcsr &= ~(__excepts | (__excepts << _FCSR_CAUSE_SHIFT));
|
||||
fesetenv(&__fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fegetexceptflag(fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
*__flagp = __fcsr & __excepts & FE_ALL_EXCEPT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fesetexceptflag(const fexcept_t* __flagp, int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
/* Ensure that flags are all legal */
|
||||
__excepts &= FE_ALL_EXCEPT;
|
||||
__fcsr &= ~__excepts;
|
||||
__fcsr |= *__flagp & __excepts;
|
||||
fesetenv(&__fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feraiseexcept(int __excepts) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
/* Ensure that flags are all legal */
|
||||
__excepts &= FE_ALL_EXCEPT;
|
||||
/* Cause bit needs to be set as well for generating the exception*/
|
||||
__fcsr |= __excepts | (__excepts << _FCSR_CAUSE_SHIFT);
|
||||
fesetenv(&__fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int fetestexcept(int __excepts) {
|
||||
fexcept_t __FCSR;
|
||||
fegetenv(&__FCSR);
|
||||
return (__FCSR & __excepts & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fegetround(void) {
|
||||
fenv_t _fcsr;
|
||||
fegetenv(&_fcsr);
|
||||
return (_fcsr & _FCSR_RMASK);
|
||||
}
|
||||
|
||||
int fesetround(int __round) {
|
||||
fenv_t _fcsr;
|
||||
fegetenv(&_fcsr);
|
||||
_fcsr &= ~_FCSR_RMASK;
|
||||
_fcsr |= (__round & _FCSR_RMASK ) ;
|
||||
fesetenv(&_fcsr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feholdexcept(fenv_t* __envp) {
|
||||
fenv_t __env;
|
||||
fegetenv(&__env);
|
||||
*__envp = __env;
|
||||
__env &= ~(FE_ALL_EXCEPT | _FCSR_ENABLE_MASK);
|
||||
fesetenv(&__env);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feupdateenv(const fenv_t* __envp) {
|
||||
fexcept_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
fesetenv(__envp);
|
||||
feraiseexcept(__fcsr & FE_ALL_EXCEPT);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int feenableexcept(int __mask) {
|
||||
fenv_t __old_fcsr, __new_fcsr;
|
||||
fegetenv(&__old_fcsr);
|
||||
__new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT;
|
||||
fesetenv(&__new_fcsr);
|
||||
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fedisableexcept(int __mask) {
|
||||
fenv_t __old_fcsr, __new_fcsr;
|
||||
fegetenv(&__old_fcsr);
|
||||
__new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT);
|
||||
fesetenv(&__new_fcsr);
|
||||
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
|
||||
}
|
||||
|
||||
int fegetexcept(void) {
|
||||
fenv_t __fcsr;
|
||||
fegetenv(&__fcsr);
|
||||
return ((__fcsr & _FCSR_ENABLE_MASK) >> _ENABLE_SHIFT);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user